Clickbait is a headline written only to make you press it. Pure clickbait, a clickbait headline, don't fall for clickbait.
It works by opening a gap between what you know and what you want to know, and closing it is the only reward — which is why the page so often disappoints. The word is always a criticism. Note that a headline can be accurate and still be clickbait, since the fault is in what it promises rather than in what it says.
Proto-Indo-European
*bʰeyd-
Middle English
bayte
English
bait
English, today
clickbait
From click + -bait. bait comes from Middle English bayte. From Middle English bayte, bait, beite, from Old Norse beita (“food, bait”), from Proto-Germanic baitō (“that which is bitten, bait”), from Proto-Indo-European bʰeyd- (“to cleave, split, separate”). Cognate with German Beize (“mordant, corrosive fluid; marinade”), Old English bāt (“that which can be bitten, food, bait”). Related to bite.
Etymology from Wiktionary, CC BY-SA